Nanometer-range atomic order directly recovered from resonant diffuse scattering

2016 ◽  
Vol 93 (5) ◽  
Author(s):  
M. Kopecký ◽  
J. Kub ◽  
J. Fábry ◽  
J. Hlinka
Keyword(s):  
Diffuse Scattering ◽  
Atomic Order ◽  
Nanometer Range ◽  
Range Atomic Order

scholarly journals FTIR-Based Crystallinity Assessment of Aragonite–Calcite Mixtures in Archaeological Lime Binders Altered by Diagenesis

Minerals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 121 ◽  
Author(s):  
Michael Toffolo ◽  
Lior Regev ◽  
Stéphan Dubernet ◽  
Yannick Lefrais ◽  
Elisabetta Boaretto
Keyword(s):  
Unknown Origin ◽  
Infrared Light ◽  
Infrared Spectrometry ◽  
Atomic Order ◽  
Range Atomic Order ◽  
Mechanisms Of Formation ◽  
History Of ◽  
Lime Plaster ◽  
Archaeological Sediments ◽  
Diagenetic History

Lime plaster and mortar are pyrotechnological materials that have been employed in constructions since prehistoric times. They may nucleate as calcite and/or aragonite under different environmental settings. In nature, aragonite and calcite form through biogenic and geogenic processes that lead to different degrees of atomic order. The latter is a result of defects in the crystal lattice, which affect the properties of crystals, including their interaction with infrared light. Using Fourier transform infrared spectrometry (FTIR) with the KBr pellet method, it is possible to exploit these differences and assess the degree of atomic order of aragonite and calcite crystals and thus their mechanisms of formation. Here we use FTIR to characterize the degree of short-range atomic order of a pyrogenic form of aragonite recently observed in experimental and archaeological lime binders. We show that pyrogenic aragonite has a unique signature that allows its identification in archaeological sediments and lime binders of unknown origin. Based on these results, we developed a new FTIR-based method to assess the integrity and degree of preservation of aragonite and calcite when they occur together in the same material. This method allowed a better assessment of the diagenetic history of an archaeological plaster and finds application in the characterization of present-day conservation materials, such as lime plaster and mortar, where different polymorphs may nucleate and undergo recrystallization processes that can alter the mechanical properties of binders.

Influence of the degree of long-range atomic order on parameters of the solid solution and the granular structure of the Pd3Fe alloy with superstructure L12

2013 ◽  
Vol 55 (9) ◽  
pp. 1936-1940
Author(s):  
E. V. Konovalova ◽  
O. B. Perevalova ◽  
N. A. Koneva ◽  
K. V. Ivanov ◽  
E. V. Kozlov
Keyword(s):  
Solid Solution ◽  
Long Range ◽  
Granular Structure ◽  
Atomic Order ◽  
Range Atomic Order

Manipulation of carrier concentration, crystallite size and density in polycrystalline anatase TiO2via amorphous-phase medium range atomic order

CrystEngComm ◽  
2015 ◽  
Vol 17 (10) ◽  
pp. 2101-2109 ◽  
Author(s):  
D. Eitan Barlaz ◽  
Edmund G. Seebauer
Keyword(s):  
Thin Film ◽  
Crystallite Size ◽  
Carrier Concentration ◽  
Deposition Temperature ◽  
Growth Conditions ◽  
Atomic Order ◽  
Amorphous Films ◽  
Medium Range ◽  
Range Atomic Order ◽  
Phase Medium

Deposition temperature and other growth conditions affect carrier concentration and other properties of thin-film polycrystalline anatase, yielding evidence for medium range atomic order in the initially amorphous films.

Reactor radiation effect on the short-range atomic order in 2TeO2·V2O5glass

1985 ◽  
Vol 87 (6) ◽  
pp. 269-274
Author(s):  
I. Gerasimova ◽  
S. Neov ◽  
B. Sidzhimov ◽  
Y. Dimitriev
Keyword(s):  
Short Range ◽  
Radiation Effect ◽  
Atomic Order ◽  
Reactor Radiation ◽  
Range Atomic Order ◽  
Short Range Atomic Order

Resonant Scattering in Condensed Matter, Experiments that Reveal Short to Long Range Atomic Order

2016 ◽  
Vol 230 (3) ◽  
Author(s):  
Jean-François Bérar ◽  
Nathalie Boudet ◽  
Nils Blanc ◽  
Shinya Hosokawa
Keyword(s):  
Long Range ◽  
Condensed Matter ◽  
Resonant Scattering ◽  
Anomalous Dispersion ◽  
Disordered Materials ◽  
X Rays ◽  
Atomic Order ◽  
Dispersion Effect ◽  
Experimental Conditions ◽  
Range Atomic Order

AbstractAfter a historical introduction of the anomalous dispersion effect, the formalism used to investigate disordered materials using the resonant scattering of X-rays is exposed. As these experiments are sensitive to the experimental conditions, some experimental settings are discussed.

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